Oil clearing sheet for makeup

ABSTRACT

To provide an oil clearing sheet for makeup, which is superior in capacity to absorb oil and can confirm the wiping state of sebum easily and clearly, and which can afford sufficient wiping feeling and satisfactory feeling to users. An oil clearing sheet for makeup, comprising a porous stretched film of a plastic material, characterized in that the porous stretched film comprises at least two porous stretched films, which are the same or different, and adjacent films differ in brightness.

FIELD OF THE INVENTION

[0001] The present invention relates to an oil clearing sheet for makeupand, more particularly, to an oil clearing sheet for makeup used forwiping oil (sebum) of the skin oozed out on the face.

BRIEF DESCRIPTION OF THE INVENTION

[0002] It has hitherto been well known that various oil clearing papersare used for wiping sebum oozed out on the portion such as face,particularly nose, cheek, forehead, and middle of forehead, thereby tomaintain the face clean and to improve applicability and spreadabilityof a cosmetic composition. The reason is as follows. That is, whenmaking up in the state where sebum is oozed out on the face, a cosmeticcomposition is not easily applied on the skin and, therefore, thespreadability of the cosmetic composition becomes poor, thereby makingit impossible to sufficiently exert the makeup effect. The oil clearingpaper also has an effect to prevent makeup from coming off and toprevent “shining face”, previously, by absorption of sebum oozed outfrom the skin with a lapsed time after making up, using the oil clearingpaper.

[0003] A conventional oil clearing paper is generally produced by usingpapers and plastic materials (e.g. thermoplastic polymer) as a rawmaterial. For example, an oil clearing paper made of paper is producedby using vegetable fibers having a capacity to absorb oil, such as hemp,synthetic pulp, and kenaf. However, the oil clearing paper made of paperhas such a drawback as to give high stimulation to the skin because ofhardness and surface roughness of the fiber material to be used. Toimprove such stimulation to the skin, strong roll press is conducted andthe surface of the paper is coated with inorganic powders such ascalcium carbonate powders, together with a sizing agent, on productionof the oil clearing paper. However, the former case has such a drawbackthat fibers pressed by roll press changes to a raised state with alapsed time, thereby stimulating the skin again, while the latter casehas such a drawback that lowering of a capacity to absorb sebum can notbe avoided because the surface of the paper is coated with the sizingagent.

[0004] In addition, the oil clearing paper made of paper has acomparatively small capacity to absorb oil and the appearance of thepaper hardly changes when absorbed sebum. Therefore, it is difficult toconfirm the degree of absorption of sebum, that is to say, wiping stateof sebum.

[0005] To solve various drawbacks and problems described above, the oilclearing paper has widely been improved. For example, Japanese ExaminedUtility Model Publication (KOKOKU) No. 4-45591 teaches that porousspherical beads are adhered on the surface of an oil clearing paper soas to solve the problems caused, when roll press is conducted and thesurface of the paper is coated with inorganic powders such as calciumcarbonate powders on production of the oil clearing paper, and toincrease the capacity to absorb sebum. Japanese Unexamined PatentPublication (KOKAI) No. 6-319664 discloses a high-density oil clearingpaper produced by mixing (A) a pulp material containing vegetable fibersas a main component with (B) an inorganic filler to prepare a papermaterial, followed by paper-making so that the weight (g/cm²) of thepaper is 0.7 or more.

[0006] The oil clearing paper made of paper disclosed in thesepublications has limitation in capacity to absorb sebum because its mainmaterial is made of paper and, particularly significantly, it isdifficult to confirm the degree of absorption of sebum, that is, wipingstate easily and accurately in use because a change in permeability ishardly recognized in the paper itself. Difficulty in confirming thewiping state of sebum means that users of the oil clearing paper do notsatisfy with removal of sebum from the face. It is a very significantevaluation point for users how much sebum was removed from the users'face by using the oil clearing paper, and satisfaction on makeup canvary largely whereby.

[0007] An oil clearing paper for makeup developed by paying attention tofacilitate the wiping state of sebum as described above has beenpublicly known, heretofore. For example, Japanese Examined PatentPublication (KOKOKU) No. 56-8606 discloses a cosmetic oil clearing paperproduced by mixing hemp fibers with 10 to 70% by weight of polyolefinresin fibers, followed by paper-making so that the weight of the paperis within a range from 12 to 50 (g/cm²). Japanese Unexamined UtilityModel Publication (KOKAI) No. 5-18392 discloses an oil clearing papercomprising an oil clearing paper body and an inorganic or organic powdermaterial such as clay particles, silica fine-particles, and powders offibers, the surface of the oil clearing paper being formed smoothly.These oil clearing papers can exert some effect with respect toclarification of the oil clearing paper due to oil absorption andconfirmation of the oil absorbing effect whereby, however, theabsorption capacity as a most significant factor for the oil clearingpaper is lowered as a result of a deleterious influence and it isdifficult to attain complete clarification in the oil clearing paperafter oil absorption.

[0008] As described above, an oil clearing paper produced by using aplastic material in place of papers is also publicly known. For example,Japanese Unexamined Patent Publication (KOKAI) No. 9-335451 discloses anoil clearing sheet made of a porous film produced by using a plasticmaterial as a main raw material. Not only this oil clearing sheet hashigher absorption capacity than that of the oil clearing paper made ofpaper, but also it is superior in confirmation of the wiping state tothe oil clearing paper made of paper. The reason is as follows. That is,the porous plastic film exhibits low transmittance before oil absorptionbecause of irregular reflection of light, but the transmittance increaseremarkably because micro-pores of the film are filled with oils, therebyto facilitate confirmation of the wiping state. However, in case wherelight transmission in the film is not complete because of incompletefilling of micro-pores of the film with fats and oils, it becomesdifficult to confirm the wiping state as a matter of course. To increasethe capacity to absorb oil, the thickness of the film may be increased.In that case, it is necessary to fill the micro-pores of the film with alarge amount of fats and oils and it becomes difficult to completelyattain a predetermined level of transmittance. It also becomes necessaryto take a long time for clearing oil, thereby to prevent a quicktreatment as an essential object of oil clearing.

[0009] Furthermore, confirmation of the wiping state may be acceleratedby coloring the oil clearing paper. However, the color, which facilitateconfirmation of the wiping state, is limited to deep color such deepblue and deep green, while the color such as white, yellow and pastel,which has a tendency to be generally loved by users, maintainsdifficulty in confirming the wiping state.

BRIEF DESCRIPTION OF THE DRAWINGS

[0010]FIG. 1 is a graph plotting a value of L* against δL* before oilabsorption in an oil cleaning sheet.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0011] It is, therefore, an object of the present invention to solve theabove-described problems of a conventional oil clearing paper for makeupand to provide an improved oil clearing sheet, which is superior incapacity to absorb oil and can confirm the wiping state easily andclearly because it becomes transparent when absorbed oil, and which canafford sufficient wiping feeling and satisfactory feeling to users.

[0012] According to the present invention, there is provided an oilclearing sheet for makeup comprising a porous stretched film of aplastic material, characterized in that the porous stretched filmcomprises at least two porous stretched films, which are the same ordifferent, and adjacent films differ in brightness.

[0013] The oil clearing sheet according to the present invention isformed of a porous stretched film of a plastic material, and the porousstretched film is composed of a laminate of at least two porousstretched films, which are the same or different, and adjacent filmsdiffer in brightness.

[0014] In the oil clearing sheet of the present invention, by satisfyingthe above-described constituent features, one film layer is clarifiedwhen it absorbed sebum and sweat after wiping them so that it reflectsthe color of another film layer, which is adjacent to the transparentfilm layer, thereby making it possible to clearly indicate the wipingstate. Such an effect is derived from the fact that adjacent filmsdiffer in brightness. This difference in brightness exerts a largeinfluence on the visibility of the film and has relation to ease ofconfirming the wiping state.

[0015] In the oil clearing sheet of the present invention, thebrightness of the porous stretched film is advantageously represented bya value of L* of a CIEL*a*b* color system. The value of L* representsdark and light (black and white) and the color becomes whiter as L*approaches 100, whereas, the color becomes blacker as L* approaches 0.Assumed that a difference obtained by subtracting L* of the film afteroil absorption from L* of the film before oil absorption is δL* whenmeasured by the reflection process, δL* becomes smaller as L* approaches100, thereby making it difficult to confirm the wiping state.

[0016] In the oil clearing sheet of the present invention, the film atthe side to be made contact with the sldn (porous stretched film as anuppermost layer) has preferably a value of L* which is different fromthat of the inside film (underlying layer) which is adjacent to thefilm. As described previously, users tend to prefer a color having ahigh value of L*, that is, pale color, however, such a color has a smallvalue of δL* and it is difficult to confirm the wiping state. Therefore,it is more preferred in the oil clearing sheet of the present inventionthat a film having a large value of L* is disposed as the porousstretched film which is the uppermost layer to be made contact with theskin, and then the other porous stretched film having a value of L*smaller than that of the uppermost layer on formation of itsmulti-layer. A difference between the value of L* of the porousstretched film as the uppermost layer and the value of L* of theunderlying film can vary depending on the desired effect, but ispreferably at least 0.8.

[0017] The oil clearing sheet according to the present invention ischaracterized in that a plastic material is used without using papers asa main raw material like a conventional oil clearing paper and,moreover, the material is in the form of a two- or multi-layer porousstretched film. The plastic material used for formation of the porousstretched film may be formed only of the same material or formed ofdifferent materials according to the desired effect. Portion of theporous stretched film used in the present invention may be replaced by anon-porous stretched or non-stretched fihm, if necessary. For example,in case of a three-layer or five-layer structure oil clearing sheet, acore film may be composed of a plastic film free from micro-pores.

[0018] The porous stretched film of the present invention is notlimited, but preferably has the following layer constitution:

[0019] (1) film A/film B,

[0020] (2) film A/film B/film A, or

[0021] (3) film A/film B/film C/film B/film A. It is particularlypreferred to employ a constitution which is symmetrical in the thicknessdirection, such as layer constitutions (2) and (3), because the sameoperation and effect can be obtained in back and front surfaces of theoil clearing sheet and the wiping efficiency is very good.

[0022] In the embodiment of the above-described layer constitution, thefilm A is a porous stretched film as the uppermost layer and this film Aand the film B as the ground can preferably have different values of L*while satisfying the relation about size. In such a layer constitution,the film A, film B and film C are preferably made of the same material,but may be made of different materials, if necessary. Furthermore, therespective films may be made of films, which have the same color butdiffer in tone, e.g. pale color and deep color, as far as they cansatisfy the features of different values of L*. For example, the porousstretched film may be made of films having different colors, such aswhite/blue and yellow/red. Furthermore, in case of the layerconstitution (3), the film C as the core material may be made of a filmfree from micro-pore, if necessary.

[0023] The porous stretched film having a multi-layer structureaccording to the present invention can be produced according to variousprocedures using a plastic material as a starting substance, but ispreferably produced by adding a filler to a crystalline thermoplasticresin having high transparency to give a main raw material, molding themain raw material to form a plastic film, and stretching this filmthereby to afford micro-pores. This procedure will be described below.

[0024] The porous stretched plastic film thus obtained is superior incapacity to absorb sebum on the skin surface because a proportion ofspace occupied in the volume of the sheet is larger than that of aconventional oil clearing paper. Accordingly, the capacity to absorb oilper unit area is remarkably large. Since this plastic film has such astructure as to contain lots of micro-pores uniformly, it is opaquebecause of diffusion of light before wiping sebum on the skin surface.However, since diffusion of light is prevented or relieved by fillingthe respective pores with sebum after oil absorption, the transparencyas an intrinsic property of the film appears again and the visibleeffect of the color of the ground film is accelerated, thereby making itpossible to confirm the wiping state of sebum easily and clearly.

[0025] In the production of the porous stretched film of the presentinvention, preferred examples of the crystalline thermoplastic resinhaving high transparency used as a main raw material include, but arenot limited to, polyolefins such as high-density polyethylene,polypropylene, modified polypropylene, and polybutylene; polyesters;polyamides; poly-4-methylpentene, and ethylene-propylene blockcopolymer. Among them, polypropylene and modified polypropylene areparticularly preferred because of melt strength on film forming.

[0026] Preferred examples of the filler used in combination with theabove thermoplastic resin so as to afford micro-pores include, but arenot limited to, organic materials such as mineral oil, glycerin,petroleum jerry, low-molecular polyethylene, polyethylene oxide,polypropylene oxide, polytetramethylene oxide, and soft carbowax; orinorganic materials such as calcium carbonate.

[0027] Various fillers can be used in the raw material used onproduction of the film. Suitable amount of the filler is within a rangefrom 20 to 60% by mass (% by weight), and more preferably from 25 to 40%by mass, based on the raw material. When the amount of the filler issmaller than 20% by mass based on the raw material, since the porosityof the film obtained after stretching is lowered, the capacity to absorboil is lowered. On the other hand, when the amount is larger than 60% bymass, it becomes difficult to form a film and only a brittle film can beobtained.

[0028] In the production of the porous stretched plastic film, otheradditives may also be added optionally, in addition to the thermoplasticresin and filler as the main raw material. For the purpose offacilitating crystallization of the main raw material, an organicnucleating agent may be added. Suitable organic nucleating agentincludes, for example, organic acids such as carboxylic acid, sulfonicacid, and phosphonic acid; or organic alcohol. Other suitable additivesinclude, for example, inorganic or organic pigments or dyes, perfumes,surfactants, lubricants, and antistatic agents. Among these additives,inorganic or organic pigments or dyes are capable of improvingvisibility through coloring of the film, thereby enhancing thereliability of the operation of confirming the wiping state. Therefore,it is preferred that most preferred one is selected according to thedesired effect and then mixed in a suitable amount.

[0029] To obtain a multi-layer plastic film containing a filler, variousprocedures can be used. In the present invention, requisite number ofmixtures obtained by melting and mixing the above main raw materials andoptional additives may be preferably molded at the same time. Thismelting/mixing process and the subsequent process can be conductedaccording to a conventional procedure. Suitable melting/mixing processincludes, for example, kneading using kneader. Suitable molding processincludes, for example, co-extrusion process, preferably inflationprocess, T-die process, and cast process. For example, according to theinflation process, a film can be made by melting and mixing the abovemain raw materials and blowing the mixture through a circular die. Forexample, according to the cast process, a film can be made by meltingand mixing the above main raw materials and extruding the mixture on achill roll (cooling roll) through a die. According to one modificationof this cast process, the melt mixture can be removed by washing with asuitable solvent after extruding on the chill roll. At this stage,stretching of the film, which is usually carried out in the subsequentprocess, may be carried out at the same time.

[0030] Next, stretching of the plastic film after film forming isconducted to afford micro-pores. The stretching can also be conductedmonoaxially or biaxially according to a conventional method in the samemanner as in case of film forming. In case of biaxial stretching,stretching in the longitudinal direction can be conducted by changing acircumferential speed of a driving roll, whereas, stretching in thewidth direction can be conducted by mechanically stretching the film inthe lateral direction while gripping right and left ends of the filmwith chucks.

[0031] Conditions of film stretching are not specifically limited, butthe film is preferably stretched so that the porosity and thickness ofthe film after stretching are within the following preferred range. Inthat case, a stretching ratio of the film can vary widely, but ispreferably within a range from 1.5 to 3.0. When the stretching ratio issmaller than 1.5, porosity enough to absorb oil can not be obtained. Onthe other hand, when the stretching ratio is larger than 3.0, since thepore diameter becomes too large, the capacity to absorb oil becomeslarger and touch to hands becomes poor before changing the color.

[0032] The pore diameter of pores formed by stretching the film ispreferably within a range from 0.2 to 5 μm. When the pore diameter issmaller than 0.2 μm, the absorption rate of sebum is lowered, therebymaking it difficult to fill micro-pores with sebum and to obtain apredetermined level of transparency. On the other hand, when the porediameter is larger than 5 μm, irregular reflection before oil absorptionis prevented and the transmittance before oil absorption is increased,thereby making it difficult to obtain a difference in transmittancebetween the film before oil absorption and that after oil absorption.

[0033] A proportion of the above pores occupied in the porous stretchedplastic film according to the present invention, that is, porosity ispreferably within a range from 5 to 50%. When the porosity obtained bystretching is smaller than 5%, the capacity to absorb oil is toolowered. On the other hand, when the porosity is larger than 50%,micro-pores can not be completely filled with sebum and thetransmittance on oil absorption can not be increased sufficiently.

[0034] The thickness of the porous stretched plastic film according tothe present invention can vary widely depending on the desired effect.The thickness of such a porous film is preferably within a range from 1to 100 μm in view of the thickness of each film constituting the porousfilm. When the thickness of each film is smaller than 1 μm, not onlyproduction of the porous film becomes difficult, but also micro-poresare easily filled with sebum, thereby causing lowering of thetransmittance of plural films. On the other hand, when the thickness ofeach film is larger than 100 μm, micro-pores are not easily filled withsebum, thereby making it difficult to confirm the wiping state.

[0035] The whole thickness of the porous stretched plastic film ispreferably within a range from 2 to 200 μm, and more preferably from 5to 200 μm. When the whole thickness of the film is smaller than 2 μm,the capacity to absorb oil is lowered and the film is adhered to theportion of the face where oil clearing is not required, resulting indifficult handling. The upper limit of the whole thickness of the filmis not specifically limited, but is not too large because too largeupper limit causes too large capacity to absorb oil and increase inproduction cost. The thickness of a conventional single-layer structureoil clearing sheet is limited to 100 μm or less. On the other hand, inthe porous stretched plastic film of the present invention, thethickness of one oil clearing sheet is further increased to 100 μm ormore by employing a multi-layer structure, thereby making it possible torealize more enhanced capacity to absorb oil without making it difficultto confirm the wiping state.

[0036] The oil clearing sheet of the present invention can exert such aremarkable effect as to have an excellent capacity to absorb sebum andto cause remarkable clarification as an index for confirmation of thewiping state of sebum. However, such an oil clearing sheet made of aplastic material is likely to fail in absorption of water such as sweatas compared with the oil clearing sheet made of paper. The presentinventors have studied intensively to solve such drawbacks and foundthat low capacity to absorb sweat is exclusively caused byhydrophobicity of the surface of the plastic sheet, so that sweat on theface and sebum dissolved into sweat can be easily absorbed by impartinghydrophilicity to the surface of the sheet. In the oil clearing sheet ofthe present invention, it is preferred that a hydrophilic liquidabsorbing substance is partially distributed on at least oil absorbingsurface of the porous stretched film.

[0037] The distribution state of the hydrophilic liquid absorbingsubstance in a hydrophilic oil clearing sheet is usually the state wherefine-particles are dispersed on the surface of the porous stretched filmnearly uniformly. Various methods can be employed to apply the liquidabsorbing substance, and the liquid absorbing substance may also becontained in the film. In case where the oil clearing sheet is designedso as to use only one surface, the liquid absorbing substance may bedistributed only on one surface of the porous stretched film, or may bedistributed on both faces.

[0038] The application of the hydrophilic liquid absorbing substance canbe made by using various methods. For example, the liquid absorbingsubstance can be advantageously applied by coating on the surface of theporous stretched film after producing the porous stretched film. In caseof this method, a desired hydrophilic oil clearing sheet can be producedby dissolving a liquid absorbing substance in a suitable solvent,coating one or both surfaces of the porous stretched film with theresulting coating solution using a suitable procedure, drying thecoating solution and removing the solvent.

[0039] The hydrophilic liquid absorbing substance, which can beadvantageously used in the production of the hydrophilic oil clearingsheet, is not specifically limited as far as it can exert the expectedoperation and effect, but is preferably a surfactant. The reason is asfollows. In case of the present invention, when liquid (droplets) suchas sweat on the face is wiped, it is necessary that the liquid absorbingsubstance is incorporated into the droplets thereby to lower the surfacetension of the droplets. To do so, presence of a substance capable ofexhibiting remarkable surface activity at low concentration, that is, asurfactant is effective. It has previously described that variousadditives can be added to raw materials in the production of a plasticfilm and a surfactant is included as one example thereof, however, thesurfactant in this case is not added for the purpose of imparting thehydrophilicity, but for the purpose of supplementing good dispersion ofadditives on kneading of the raw materials.

[0040] The surfactant suited for use as the hydrophilic liquid absorbingsubstance includes, but is not limited to:

[0041] anionic surfactant such as allyl sulfate ester, alkylbenzenesulfonate salt, and polyoxyethylene alkyl phosphate ester;

[0042] nonionic surfactant such as polyoxyethylene alkyl ether, sorbitanfatty acid ester, and polyoxyethylene sorbitan fatty acid ester;

[0043] cationic surfactant such as alkylamine salt, and quaternaryammonium salt; and

[0044] hydrophilic polymer such as polyvinyl alcohol, polyethyleneglycol, and polypropylene glycol. Among them, sorbitan fatty acid esterrepresented by sorbitan monolaurate can be used particularlyadvantageously because it is superior in impartation of hydrophilicityand is also superior in safety to the skin.

[0045] In case where the coating solution is prepared from theabove-described hydrophilic liquid absorbing substance, suitable solventincludes, but is not limited to, isopropyl alcohol, ethanol, water,methyl ethyl ketone, toluene, ethyl acetate, and heptane. Among thesesolvents, isopropyl alcohol can be used particularly advantageouslybecause it has comparatively high solubility to the liquid absorbingsubstance and high volatility.

[0046] The concentration of the hydrophilic liquid absorbing substancein the coating solution can vary widely depending on the kind and degreeof surface activity of the liquid absorbing substance to be used, andthe desired effect, but is preferably an enough amount so that thecapacity to absorb liquid of the porous stretched film after impartingthe hydrophilicity is within a range from 0.00003 to 0.005 cm³ per unitarea in case where the amount is represented with respect to the waterabsorption amount of the film. When the capacity to absorb liquiddeviates from the above range, it is impossible to obtain satisfactorycapacity to absorb sweat in the resulting cosmetic oil clearing sheet.Preferred range of such capacity to absorb liquid is a standard whichcan be applied to the resulting whole cosmetic oil clearing sheet.

[0047] The surface tension of an aqueous solution of the liquidabsorbing substance distributed on the surface of the porous stretchedfilm is preferably within a range from 15.0 to 36.0 dyn/cm. When thesurface tension of the surface of the porous stretched film deviatesfrom the above range, satisfactory capacity to absorb sweat can not beobtained in the resulting oil clearing sheet and, in case where thedegree of sweat absorption and oil clearing is evaluated by a change incolor of the oil clearing sheet, this film can not be used effectively.

[0048] In case where the coating solution is coated on the porousstretched film, a coating operation can be conducted according to aconventional procedure. Preferred coating method includes, for example,gravure coating, flexo-coating, screen coating, dip coating, and spraycoating. The coating weight of the coating solution on the surface ofthe porous stretched film can vary widely depending on the kind anddegree of surface activity of the liquid absorbing substance to be used,and the desired effect, but is sufficiently from about 0.1 to 3 g/m².

[0049] In the production of the oil clearing sheet according to thepresent invention, a method of mixing the liquid absorbing substance inthe film during the production process of the porous stretched film canbe employed in place of the coating method described above. In theproduction of the porous stretched film, a desired hydrophilic oilclearing sheet can be produced by mixing the liquid absorbing substanceat any time when a thermoplastic resin, a filler and an organic solventas raw materials of the film are molten and mixed. Also in case of sucha method, the liquid absorbing substance described with respect toapplication of the liquid absorbing substance due to coating can be usedin the same manner. The amount thereof is preferably an amount enough tosecure the above-described capacity to absorb liquid. In case of such amethod, diethanolamide laurate can be used particularly advantageouslyin view of the heat resistance and hydrophilicity of the substanceitself, among various usable liquid absorbing substances.

EXAMPLES

[0050] Subsequently, the present invention will be described withreference to the examples. In the following examples, “parts” means“parts by weight”, unless otherwise stated.

Example 1

[0051] Preparation of Melt Mixture A The following raw materials weremolten and mixed in the amount described below to prepare a melt mixtureA. Polypropylene resin 65.0 parts (available from Union Carbide underthe tradename of “5D45”) Mineral oil 35.0 parts (available from Amco Oil& Chemical Co. under the tradename of “White Mineral Oil #31”)

[0052] Preparation of Melt Mixture B The following raw materials weremolten and mixed in the amount described below to prepare a melt mixtureB. Polypropylene resin 63.6 parts (available from Union Carbide underthe tradename of “5D45”) Mineral oil 35.0 parts (available from Amco Oil& Chemical Co. under the tradename of “White Mineral Oil #31”) Bluepigment  1.4 parts (available from Clariant Co. under the trade name of“Renafin Blue APY5014A”)

[0053] Production of Oil Clearing Sheet

[0054] The resulting melt mixtures A and B were cast on a cooling rollthrough a co-extrusion die so that a film derived from the melt mixtureB is sandwiched between films derived from the melt mixture A, therebyto form a film. Then, the resulting laminate (film A/film B) wasbiaxially stretched (1.8 times in a longitudinal direction, 1.8 times ina width direction) to obtain a porous stretched plastic film wherein apale blue film B is sandwiched between white films A. The feature ofthis porous film is as follows. Thickness of film (whole thickness) 105μm Thickness of film A  35 μm Thickness of film B  35 μm Porosity  30%

[0055] The resulting porous film was cut into rectangular pieces havinga length of 9 cm and a width of 6 cm to make test films, and then amonitor test by twenty panelists was carried out. As a result, it hasbeen found that this test film exhibits good feeling to the skin andexcellent effect of removing oil and can judge the wiping state of oileasily and clearly by a remarkable change in color (remarkabledevelopment of color of a ground film B due to clarification of a filmA) when used as a cosmetic oil clearing sheet. This film was not brokenduring the evaluation test.

[0056] After laying five test films (having a length of 9 cm and a widthof 6 cm) one upon another, the chromaticity (value of L*) was measuredaccording to the reflection process. A calorimeter used herein ismanufactured by Nippon Denshoku Kogyo Co. under the trade name of“SZ-Σ80”. To measure the chromaticity (value of L*) after oilabsorption, five films were laid one upon another and then dipped in acommercially available mineral oil. After allowing to stand for 1minute, oil remained on the film surface was wiped by a paper towel andthe chromaticity was measured again according to the reflection process.

[0057] As a result, the following results were obtained. Value of L*before oil absorption 90.66 Value of L* after oil absorption 71.33

[0058] It became apparent that δL*, that is, (value of L* before oilabsorption)−(value of L* after oil absorption) is 19.33 and it ispossible to confirm the wiping state very satisfactorily. Further, theL* values (before oil absorption) of the films A and B were 98.33 and68.1, respectively, and thus the difference in the L* value betweenthese films was 30.23. The measurement results of this example aresummarized in Table 1 below, together with those of the other examples.

Example 2

[0059] The procedure described in Example 1 was repeated, except thatthe film A and film B were respectively prepared from the following meltmixtures in this example. Composition of Melt Mixture A Polypropyleneresin (aforecited) 63.6 parts Mineral oil (aforecited) 35.0 parts Bluepigment (aforecited)  1.4 parts

[0060] Composition of Melt Mixture B Polypropylene resin (aforecited)62.25 parts Mineral oil (aforecited) 35.00 parts Blue pigment(aforecited)  2.75 parts

[0061] There was obtained a porous stretched plastic film wherein a bluefilm B is sandwiched between pale blue films A. The feature of thisporous film is as follows. Thickness of film (whole thickness) 105 μmThickness of film A  35 μm Thickness of film B  35 μm Porosity  32%

[0062] Further, the L* values (before oil absorption) of the films A andB were 68.1 and 61.04, respectively, and thus the difference in the L*value between these films was 7.06.

[0063] It has been found that this test film exhibits good feeling tothe skin and excellent effect of removing oil and can judge the wipingstate of oil easily and clearly by a remarkable change in color whenused as a cosmetic oil clearing sheet. This film was not broken duringthe evaluation test.

[0064] Subsequently, a change in brightness before and after oilabsorption of this porous film was measured according to the sameprocedure as in Example 1. As a result, the measurement results asdescribed in Table 1 below were obtained.

Example 3

[0065] The procedure described in Example 1 was repeated, except thatthe film A and film B were respectively prepared from the following meltmixtures in this example. Composition of Melt Mixture A Polypropyleneresin (aforecited)  5.0 parts Mineral oil (aforecited) 35.0 parts

[0066] Composition of Melt Mixture B Polypropylene resin (aforecited) 2.25 parts Mineral oil (aforecited) 35.00 parts Blue pigment(aforecited)  2.75 parts

[0067] There was obtained a porous stretched plastic film wherein a bluefilm B is sandwiched between white films A. The feature of this porousfilm is as follows. Thickness of film (whole thickness) 05 μm Thicknessof film A 35 μm Thickness of film B 35 μm Porosity 32%

[0068] Further, the L* values (before oil absorption) of the films A andB were 98.33 and 61.04, respectively, and thus the difference in the L*value between these films was 37.29.

[0069] It has been found that this test film exhibits good feeling tothe skin and excellent effect of removing oil and can judge the wipingstate of oil easily and clearly by a remarkable change in color whenused as a cosmetic oil clearing sheet. This film was not broken duringthe evaluation test.

[0070] Subsequently, a change in brightness before and after oilabsorption of this porous film was measured according to the sameprocedure as in Example 1. As a result, the measurement results asdescribed in Table 1 below were obtained.

Example 4

[0071] The procedure described in Example 1 was repeated, except thatthe film A and film B were respectively prepared from the following meltmixtures in this example. Composition of Melt Mixture A Polypropyleneresin (aforecited)  5.0 parts Mineral oil (aforecited) 35.0 parts

[0072] Composition of Melt mixture B Polypropylene resin (aforecited) 2.25 parts Mineral oil (aforecited) 35.00 parts Blue pigment(aforecited)  2.75 parts

[0073] There was obtained a porous stretched plastic film wherein a bluefilm B is sandwiched between white films A. The feature of this porousfilm is as follows. Thickness of film (whole thickness) 39 μm Thicknessof film A 13 μm Thickness of film B 13 μm Porosity 39%

[0074] Further, the L* values (before oil absorption) of the films A andB were 98.33 and 61.04, respectively, and thus the difference in the L*value between these films was 37.29.

[0075] It has been found that this test film exhibits good feeling tothe skin and excellent effect of removing oil and can judge the wipingstate of oil easily and clearly by a remarkable change in color whenused as a cosmetic oil clearing sheet. This film was not broken duringthe evaluation test.

[0076] Subsequently, a change in brightness before and after oilabsorption of this porous film was measured according to the sameprocedure as in Example 1. As a result, the measurement results asdescribed in Table 1 below were obtained.

Example 5

[0077] The procedure described in Example 1 was repeated, except thatthe film A and film B were respectively prepared from the following meltmixtures in this example. Composition of Melt Mixture A Polypropyleneresin (aforecited)  5.0 parts Mineral oil (aforecited) 35.0 parts

[0078] Composition of Melt Mixture B: Polypropylene resin (aforecited) 2.50 parts Mineral oil (aforecited) 35.00 parts Green pigment  3.25parts (available from Clariant Co. under the tradename of “Renafin GreenAEY003A”)

[0079] There was obtained a porous stretched plastic film wherein a palegreen film B is sandwiched between white films A. The feature of thisporous film is as follows. Thickness of film (whole thickness) 105 μmThickness of film A  35 μm Thickness offilmB  35 μm Porosity 30%

[0080] Further, the L* values (before oil absorption) of the films A andB were 98.33 and 85.99, respectively, and thus the difference in the L*value between these films was 12.34.

[0081] It has been found that this test film exhibits good feeling tothe skin and excellent effect of removing oil and can judge the wipingstate of oil easily and clearly by a remarkable change in color whenused as a cosmetic oil clearing sheet. This film was not broken duringthe evaluation test.

[0082] Subsequently, a change in brightness before and after oilabsorption of this porous film was measured according to the sameprocedure as in Example 1. As a result, the measurement results asdescribed in Table 1 below were obtained.

Example 6

[0083] The procedure described in Example 1 was repeated, except thatthe film A and film B were respectively prepared from the following meltmixtures in this example. Composition of Melt Mixture A: Polypropyleneresin (aforecited) 62.50 parts Mineral oil (aforecited) 35.00 partsGreen pigment (aforecited)  3.25 parts

[0084] Composition of Melt Mixture B: Polypropylene resin (aforecited)58.5 parts Mineral oil (aforecited) 35.0 parts Green pigment(aforecited)  6.5 parts

[0085] There was obtained a porous stretched plastic film wherein agreen film B is sandwiched between pale green films A. The feature ofthis porous film is as follows. Thickness of film (whole thickness) 105μm Thickness of film A  35 μm Thickness of film B  35 μm Porosity 31%

[0086] Further, the L* values (before oil absorption) of the films A andB were 85.99 and 68.69, respectively, and thus the difference in the L*value between these films was 17.33.

[0087] It has been found that this test film exhibits good feeling tothe skin and excellent effect of removing oil and can judge the wipingstate of oil easily and clearly by a remarkable change in color whenused as a cosmetic oil clearing sheet. This film was not broken duringthe evaluation test.

[0088] Subsequently, a change in brightness before and after oilabsorption of this porous film was measured according to the sameprocedure as in Example 1. As a result, the measurement results asdescribed in Table 1 below were obtained.

Example 7

[0089] The procedure described in Example 1 was repeated, except thatthe film A and film B were respectively prepared from the following meltmixtures in this example. Composition of melt mixture A: Polypropyleneresin (aforecited) 65.00 parts Mineral oil (aforecited) 35.00 parts

[0090] Composition of melt mixture B: Polypropylene resin (aforecited)58.5 parts 1\4 Mineral oil (aforecited) 35.0 parts Green pigment(aforecited)  6.5 parts

[0091] There was obtained a porous stretched plastic film wherein agreen film B is sandwiched between white films A. The feature of thisporous film is as follows. Thickness of film (whole thickness) 105 μmThickness of film A  35 μm Thickness of film B  35 μm Porosity 31%

[0092] Further, the L* values (before oil absorption) of the films A andB were 98.33 and 68.69, respectively, and thus the difference in the L*value between these films was 29.64.

[0093] It has been found that this test film exhibits good feeling tothe skin and excellent effect of removing oil and can judge the wipingstate of oil easily and clearly by a remarkable change in color whenused as a cosmetic oil clearing sheet. This film was not broken duringthe evaluation test.

[0094] Subsequently, a change in brightness before and after oilabsorption of this porous film was measured according to the sameprocedure as in Example 1. As a result, the measurement results asdescribed in Table 1 below were obtained.

Example 8

[0095] The procedure described in Example 1 was repeated, except thatthe film A and film B were respectively prepared from the following meltmixtures in this example. Composition of Melt Mixture A Polypropyleneresin (aforecited) 65.0 parts Mineral oil (aforecited) 35.0 parts

[0096] Composition of Melt Mixture B Polypropylene resin (aforecited)58.5 parts Mineral oil (aforecited) 35.0 parts Green pigment(aforecited)  6.5 parts

[0097] There was obtained a porous stretched plastic film wherein agreen film B is sandwiched between white films A. The feature of thisporous film is as follows. Thickness of film (whole thickness) 39 μmThickness of film A 13 μm Thickness of film B 13 μm Porosity 38%

[0098] Further, the L* values (before oil absorption) of the films A andB were 98.33 and 68.69, respectively, and thus the difference in the L*value between these films was 29.64.

[0099] It has been found that this test film exhibits good feeling tothe skin and excellent effect of removing oil and can judge the wipingstate of oil easily and clearly by a remarkable change in color whenused as a cosmetic oil clearing sheet. This film was not broken duringthe evaluation test.

[0100] Subsequently, a change in brightness before and after oilabsorption of this porous film was measured according to the sameprocedure as in Example 1. As a result, the measurement results asdescribed in Table 1 below were obtained.

Example 9

[0101] The procedure described in Example 1 was repeated, except thatthe film A and film B were respectively prepared from the following meltmixtures in this example. Composition of melt mixture A: Polypropyleneresin (aforecited) 65.0 parts Mineral oil (aforecited) 35.0 parts

[0102] Composition of Melt Mixture B Polypropylene resin (aforecited)64.6 parts Mineral oil (aforecited) 35.0 parts Red pigment  0.4 parts(available from Clariant Co. under the tradename of “Renafin RedMY3034A”)

[0103] There was obtained a porous stretched plastic film wherein a palered (pink) film B is sandwiched between white films A. The feature ofthis porous film is as follows. Thickness of film (whole thickness) 105μm Thickness of film A  35 82 m Thickness of film B  35 μm Porosity 33%

[0104] Further, the L* values (before oil absorption) of the films A andB were 98.33 and 80.24, respectively, and thus the difference in the L*value between these films was 18.09.

[0105] It has been found that this test film exhibits good feeling tothe skin and excellent effect of removing oil and can judge the wipingstate of oil easily and clearly by a remarkable change in color whenused as a cosmetic oil clearing sheet. This film was not broken duringthe evaluation test.

[0106] Subsequently, a change in brightness before and after oilabsorption of this porous film was measured according to the sameprocedure as in Example 1. As a result, the measurement results asdescribed in Table 1 below were obtained.

Example 10

[0107] The procedure described in Example 1 was repeated, except thatthe film A and film B were respectively prepared from the following meltmixtures in this example. Composition of Melt Mixture A Polypropyleneresin (aforecited) 64.6 parts Mineral oil (aforecited) 35.0 parts Redpigment (aforecited)  0.4 parts

[0108] Composition of Melt Mixture B: Polypropylene resin (aforecited)64.3 parts Mineral oil (aforecited) 35.0 parts Red pigment (aforecited) 0.7 parts

[0109] There was obtained a porous stretched plastic film wherein a redfilm B is sandwiched between pink films A. The feature of this porousfilm is as follows. Thickness of film (whole thickness) 105 μm Thicknessof film A  35 μm Thickness of film B  35 μm Porosity 38%

[0110] Further, the L* values (before oil absorption) of the films A andB were 80.24 and 61.29, respectively, and thus the difference in the L*value between these films was 18.95.

[0111] It has been found that this test film exhibits good feeling tothe skin and excellent effect of removing oil and can judge the wipingstate of oil easily and clearly by a remarkable change in color whenused as a cosmetic oil clearing sheet. This film was not broken duringthe evaluation test.

[0112] Subsequently, a change in brightness before and after oilabsorption of this porous film was measured according to the sameprocedure as in Example 1. As a result, the measurement results asdescribed in Table 1 below were obtained.

Example 11

[0113] The procedure described in Example 1 was repeated, except thatthe film A and film B were respectively prepared from the following meltmixtures in this example. Composition of Melt Mixture A Polypropyleneresin (aforecited) 65.0 parts Mineral oil (aforecited) 35.0 parts

[0114] Composition of Melt Mixture B Polypropylene resin (aforecited)64.3 parts Mineral oil (aforecited) 35.0 parts Red pigment (aforecited) 0.7 parts

[0115] There was obtained a porous stretched plastic film wherein a redfilm B is sandwiched between white films A. The feature of this porousfilm is as follows. Thickness of film (whole thickness) 105 μm Thicknessof film A 35 μm Thickness of film B 35 μm Porosity 33%

[0116] Further, the L* values (before oil absorption) of the films A andB were 98.33 and 61.29, respectively, and thus the difference in the L*value between these films was 37.04.

[0117] It has been found that this test film exhibits good feeling tothe skin and excellent effect of removing oil and can judge the wipingstate of oil easily and clearly by a remarkable change in color whenused as a cosmetic oil clearing sheet. This film was not broken duringthe evaluation test.

[0118] Subsequently, a change in brightness before and after oilabsorption of this porous film was measured according to the sameprocedure as in Example 1. As a result, the measurement results asdescribed in Table 1 below were obtained.

Example 12

[0119] The procedure described in Example 1 was repeated, except thatthe film A and film B were respectively prepared from the following meltmixtures in this example. Composition of Melt Mixture A Polypropyleneresin (aforecited) 65.0 parts Mineral oil (aforecited) 35.0 parts

[0120] Composition of melt mixture B: Polypropylene resin (aforecited)63.75 parts Mineral oil (aforecited) 35.00 parts Yellow pigment  1.25parts (available from Clariant Co. mider the tradename of “RenafinYellow APY1016A”)

[0121] There was obtained a porous stretched plastic film wherein a paleyellow film B is sandwiched between white films A. The feature of thisporous film is as follows. Thickness of film (whole thickness) 105 μmThickness of film A  35 μm Thickness of film B  35 μm Porosity 32%

[0122] Further, the L* values (before oil absorption) of the films A andB were 98.33 and 95.27, respectively, and thus the difference in the L*value between these films was 3.06.

[0123] It has been found that this test film exhibits good feeling tothe skin and excellent effect of removing oil and can judge the wipingstate of oil easily and clearly by a remarkable change in color whenused as a cosmetic oil clearing sheet. This film was not broken duringthe evaluation test.

[0124] Subsequently, a change in brightness before and after oilabsorption of this porous film was measured according to the sameprocedure as in Example 1. As a result, the measurement results asdescribed in Table 1 below were obtained.

Example 13

[0125] The procedure described in Example 1 was repeated, except thatthe film A and film B were respectively prepared from the following meltmixtures in this example. Composition of Melt Mixture A Polypropyleneresin (aforecited) 63.75 parts Mineral oil (aforecited) 35.00 partsYellow pigment (aforecited)  1.25 parts

[0126] Composition of Melt Mixture B Polypropylene resin (aforecited)62.5 parts Mineral oil (aforecited) 35.0 parts Yellow pigment(aforecited)  2.5 parts

[0127] There was obtained a porous stretched plastic film wherein ayellow film B is sandwiched between pale yellow films A. The feature ofthis porous film is as follows. Thickness of film (whole thickness) 105μm Thickness of film A  35 μm Thickness of film B  35 μm Porosity 37%

[0128] Further, the L* values (before oil absorption) of the films A andB were 95.27 and 94.47, respectively, and thus the difference in the L*value between these films was 0.8.

[0129] It has been found that this test film exhibits good feeling tothe skin and excellent effect of removing oil and can judge the wipingstate of oil easily and clearly by a remarkable change in color whenused as a cosmetic oil clearing sheet. This film was not broken duringthe evaluation test.

[0130] Subsequently, a change in brightness before and after oilabsorption of this porous film was measured according to the sameprocedure as in Example 1. As a result, the measurement results asdescribed in Table 1 below were obtained.

Example 14

[0131] The procedure described in Example 1 was repeated, except thatthe film A and film B were respectively prepared from the following meltmixtures in this example. Composition of Melt Mixture A: Polypropyleneresin (aforecited) 65.0 parts Mineral oil (aforecited) 35.0 parts

[0132] Composition of Melt Mixture B Polypropylene resin (aforecited)62.5 parts Mineral oil (aforecited) 35.0 parts Yellow pigment(aforecited)  2.5 parts

[0133] There was obtained a porous stretched plastic film wherein ayellow film B is sandwiched between white films A. The feature of thisporous film is as follows. Thickness of film (whole thickness) 105 μmThickness of film A  35 μm Thickness of film B  35 μm Porosity 33%

[0134] Further, the L* values (before oil absorption) of the films A andB were 98.33 and 94.47, respectively, and thus the difference in the L*value between these films was 3.86.

[0135] It has been found that this test film exhibits good feeling tothe skin and excellent effect of removing oil and can judge the wipingstate of oil easily and clearly by a remarkable change in color whenused as a cosmetic oil clearing sheet. This film was not broken duringthe evaluation test.

[0136] Subsequently, a change in brightness before and after oilabsorption of this porous film was measured according to the sameprocedure as in Example 1. As a result, the measurement results asdescribed in Table 1 below were obtained.

Example 15

[0137] The procedure described in Example 1 was repeated, except thatthe film A and film B were respectively prepared from the following meltmixtures in this example. Composition of Melt Mixture A Polypropyleneresin (aforecited) 65.00 parts Mineral oil (aforecited) 35.00 partsYellow pigment (aforecited)  1.25 parts

[0138] Composition of Melt Mixture B Polypropylene resin (aforecited)64.3 parts Mineral oil (aforecited) 35.0 parts Red pigment (aforecited) 0.7 parts

[0139] There was obtained a porous stretched plastic film wherein a redfilm B is sandwiched between pale yellow films A. The feature of thisporous film is as follows. Thickness of film (whole thickness) 105 μmThickness of film A  35 μm Thickness of film B  35 μm Porosity 36%

[0140] Further, the L* values (before oil absorption) of the films A andB were 95.27 and 61.29, respectively, and thus the difference in the L*value between these films was 33.98.

[0141] It has been found that this test film exhibits good feeling tothe skin and excellent effect of removing oil and can judge the wipingstate of oil easily and clearly by a remarkable change in color whenused as a cosmetic oil clearing sheet. This film was not broken duringthe evaluation test.

[0142] Subsequently, a change in brightness before and after oilabsorption of this porous film was measured according to the sameprocedure as in Example 1. As a result, the measurement results asdescribed in Table 1 below were obtained.

Comparative Examples Comparative Examples 1-9

[0143] The procedure described in Example 1 was repeated, except thateach oil clearing sheet having a single-layer structure was produced forcomparison in place of the oil clearing sheet having a three-layerstructure according to the following procedure in these example.

[0144] Production of oil clearing sheet:

[0145] A melt mixture prepared as a raw material was cast on a coolingroll through an extrusion die and the resulting film was biaxiallystretched (1.8 times in a longitudinal direction, 1.8 times in a widthdirection). As a result, a porous stretched plastic film was obtained.

[0146] The composition of the melt mixture used as the raw material ineach Comparative Example and the feature of the resulting porous film(single-layer oil clearing sheet) are described below. COMPARATIVEEXAMPLES 1-9 Ex. 1 Ex. 2 Ex. 3 Ex. 4 Ex. 5 Ex. 6 Ex. 7 Ex. 8 Ex. 9COMPOSITION OF MELT MIXTURE Polypropylene 65.0 63.6 62.25 62.75 58.564.6 64.3 63.75 62.5 Resin parts parts parts parts parts parts partsparts parts Mineral Oil 35.0 35.0 35.0 35.0 35.0 35.0 35.0 35.0 35.0parts parts parts parts parts parts parts parts parts Blue Pigment — 1.42.75 — — — — — — parts parts Green Pigment — — — 3.25 6.5 — — — — partsparts Red Pigment — — — — — 0.4 0.7 — — parts parts Yellow Pigment — — —— — — — 1.25 2.5 parts parts FEATURE OF POROUS FILM Color of Film PalePale Pale White Blue Blue Green Green Pink Red Yellow Yellow Thicknessof Film 35 μm 35 μm 35 μm 35 μm 35 μm 35 μm 35 μm 35 μm 35 μm Porosity30% 30% 37% 30% 33% 38% 38% 35% 45%

[0147] Subsequently, a change in brightness before and after oilabsorption of this porous film was measured according to the sameprocedure as in Example 1. As a result, the measurement results asdescribed in Table 1 below were obtained.

Comparative Examples 10-17

[0148] The procedure described in Example 1 was repeated, except thateach oil clearing sheet having a three-layer structure was produced forcomparison by changing the melt mixtures A and B used as the rawmaterial as follows.

[0149] The composition of the melt mixtures A and B used as the rawmaterial in each Comparative Example and the feature of the resultingporous film (oil clearing sheet having a three-layer structure) aredescribed below.

Comparative Example 10

[0150] Composition of Melt Mixture A Polypropylene resin (aforecited)63.6 parts Mineral oil (aforecited) 35.0 parts Blue pigment (aforecited) 1.4 parts

[0151] Composition of Melt Mixture B Polypropylene resin (aforecited)65.0 parts Mineral oil (aforecited) 35.0 parts

[0152] Feature of Porous Film

[0153] Porous stretched plastic film wherein a white film B issandwiched between pale blue films A Thickness of film (whole thickness)105 μm Thickness of film A  35 μm Thickness of film B  35 μm Porosity30%

Comparative Example 11

[0154] Composition of Melt Mixture A Polypropylene resin (aforecited)62.25 parts Mineral oil (aforecited) 35.00 parts Blue pigment(aforecited)  2.75 parts

[0155] Composition of Melt Mixture B Polypropylene resin (aforecited)63.6 parts Mineral oil (aforecited) 35.0 parts Blue pigment (aforecited) 1.4 parts

[0156] Feature of Porous Film

[0157] Porous stretched plastic film wherein a pale blue film B issandwiched between blue films A Thickness of film (whole thickness) 105μm  Thickness of film A 35 μm Thickness of film B 35 μm Porosity 32%

Comparative Example 12

[0158] Composition of Melt Mixture A Polypropylene resin (aforecited)62.50 parts Mineral oil (aforecited) 35.00 parts Green pigment(aforecited)  3.25 parts

[0159] Composition of Melt Mixture B Polypropylene resin (aforecited)65.0 parts Mineral oil (aforecited) 35.0 parts

[0160] Feature of Porous Film

[0161] Porous stretched plastic film wherein a white film B issandwiched between pale green films A Thickness of film (wholethickness) 105 μm  Thickness of film A 35 μm Thickness of film B 35 μmPorosity 30%

Comparative Example 13

[0162] Composition of Melt Mixture A Polypropylene resin (aforecited)58.5 parts Mineral oil (aforecited) 35.0 parts Green pigment(aforecited)  6.5 parts

[0163] Composition of Melt Mixture B Polypropylene resin (aforecited)62.50 parts Mineral oil (aforecited) 35.00 parts Green pigment(aforecited)  3.25 parts

[0164] Feature of Porous Film

[0165] Porous stretched plastic film wherein a pale green film B issandwiched between green films A Thickness of film (whole thickness) 105μm  Thickness of film A 35 μm Thickness of film B 35 μm Porosity 32%

Comparative Example 14

[0166] Composition of Melt Mixture A Polypropylene resin (aforecited)64.6 parts Mineral oil (aforecited) 35.0 parts Red pigment (aforecited) 0.4 parts

[0167] Composition of Melt Mixture B Polypropylene resin (aforecited)65.0 parts Mineral oil (aforecited) 35.0 parts

[0168] Feature of Porous Film

[0169] Porous stretched plastic film wherein a white film B issandwiched between pink films A Thickness of film (whole thickness) 105μm Thickness of film A  35 μm Thickness of film B  35 μm Porosity  35%

Comparative Example 15

[0170] Composition of Melt Mixture A Polypropylene resin (aforecited)64.3 parts Mineral oil (aforecited) 35.0 parts Red pigment (aforecited) 0.7 parts

[0171] Composition of Melt Mixture B Polypropylene resin (aforecited)64.6 parts Mineral oil (aforecited) 35.0 parts Red pigment (aforecited) 0.4 parts

[0172] Feature of Porous Film

[0173] Porous stretched plastic film wherein a pink film B is sandwichedbetween red films A Thickness of film (whole thickness) 105 μm Thicknessof film A  35 μm Thickness of film B  35 μm Porosity  38%

Comparative Example 16

[0174] Composition of Melt Mixture A Polypropylene resin (aforecited)63.75 parts Mineral oil (aforecited) 35.00 parts Yellow pigment(aforecited)  1.25 parts

[0175] Composition of Melt Mixture B Polypropylene resin (aforecited)65.0 parts Mineral oil (aforecited) 35.0 parts

[0176] Feature of Porous Film

[0177] Porous stretched plastic film wherein a white film B issandwiched between pale yellow film A Thickness of film (wholethickness) 105 μm Thickness of film A  35 μm Thickness of film B  35 μmPorosity  33%

[0178] Composition of Melt Mixture A: Polypropylene resin (aforecitecl)62.5 parts Mineral oil (aforecited) 35.0 parts Yellow pigment(aforecited)  2.5 parts

[0179] Composition of Melt Mixture B Polypropylene resin (aforecited)63.75 parts Mineral oil (aforecited) 35.00 parts Yellow pigment(aforecited)  1.25 parts

[0180] Feature of Porous Film

[0181] Porous stretched plastic film wherein a pale yellow film B issandwiched between yellow films A Thickness of film (whole thickness)105 μm Thickness offilm A  35 μm Thickness of film B  35 μm Porosity 38%

[0182] Subsequently, a change in brightness before and after oilabsorption of this porous film was measured according to the sameprocedure as in Example 1. As a result, the measurement results asdescribed in Table 1 below were obtained. TABLE 1 L* before Layer oil L*after oil Example No. constitution absorption absorption δL* Example 1A/B/A 90.66 71.33 19.33 Example 2 A/B/A 67.93 49.67 18.26 Example 3A/B/A 90.59 66.60 23.99 Example 4 A/B/A 85.2 67.2 18.0 Example S A/B/A93.54 85.54 8.00 Example 6 A/B/A 84.61 62.14 22.47 Example 7 A/B/A 90.9471.10 19.84 Example 8 A/B/A 86.1 67.3 18.8 Example 9 A/B/A 92.52 78.0114.51 Example 10 A/B/A 79.01 58.45 20.56 Example 11 A/B/A 90.34 65.7324.61 Example 12 A/B/A 96.76 93.46 3.30 Example 13 A/B/A 94.77 89.934.84 Example 14 A/B/A 97.16 92.57 4.59 Example 15 A/B/A 90.98 68.5922.39 Comp. Ex. 1 Single layer 98.33 97.18 1.15 Comp. Ex. 2 Single layer68.1 50.54 17.56 Comp. Ex. 3 Single layer 61.04 40.44 20.60 Comp. Ex. 4Single layer 85.99 73.41 12.58 Comp. Ex. 5 Single layer 68.69 51.9716.72 Gomp. Ex. 6 Single layer 80.24 68.43 11.81 Comp. Ex. 7 Singlelayer 61.29 44.13 17.16 Comp. Ex. 8 Single layer 95.27 92.1 3.17 Comp.Ex. 9 Single layer 94.47 90.35 4.12 Comp. Ex. 10 A/B/A 68.76 64.37 4.39Comp. Ex. 11 A/B/A 60.98 46.23 14.75 Comp. Ex. 12 A/B/A 85.75 82.77 2.98Comp. Ex. 13 A/B/A 68.03 57.98 10.05 Comp. Ex. 14 A/B/A 80.21 77.87 2.34Comp. Ex. 15 A/B/A 61.17 51.71 9.46 Comp. Ex. 16 A/B/A 96.47 93.92 2.55Comp. Ex. 17 A/B/A 93.83 92.07 1.76

[0183] In the column of the layer constitution of Table 1, “A” and “B”denote a film A and a film B, respectively.

[0184]FIG. 1 is a graph showing plot of a value of L* against δL* beforeoil absorption for the measurement results described in Table 1. In thedrawing, E denotes Examples 1 to 15 (Examples of the present invention)and R denotes Comparative Examples 1 to 17. Further, in the left uppercolumn of the graph, “A” denotes a film A, and “B” denotes a film B.Furthermore, symbols □, Δ, ▴, , and ⋄ denote Comparative Examples(single-layer films), Comparative Examples (those wherein the thicknessof the inner layer is smaller than that of the outer layer, exampleswherein sufficient effect is not obtained because a value of L* of theinner layer is high), Examples of the present invention (exampleswherein a difference in value of L* between the outer layer and innerlayer is comparatively small), Examples of the present invention(examples wherein a difference in value of L* between the outer layerand inner layer is comparatively large) and Examples of the presentinvention (examples using a tissue film wherein the thickness of asingle layer is smaller than that of the other examples of the presentinvention), respectively.

[0185] As is apparent from the results described in the graph of FIG. 1and Table 1, in case where the oil clearing sheet is constituted likethe present invention, it is possible to confirm the wiping state of oileasily and clearly, thereby affording sufficiently high satisfactoryfeeling about wiping of oil. Especially, according to the presentinvention, it is preferred that a L* value of the outer layer is largerthan that of the inner layer, a difference of the L* value between theselayers is remarkably large, and the film constituting the oil cleaningsheet has a reduced thickness.

[0186] As described above, according to the present invention, an oilclearing paper itself is not formed of a paper of a fiber material likea conventional oil clearing paper, but formed of a porous film of aplastic material, thereby enabling fine pores in the film to adsorb oiloozed out on the surface and, at the same time, the porous film isformed of two or more films which differ in brightness. Therefore, notonly high capacity to absorb oil can be afforded, but also excellenttransparency of the oil-absorbed portion and development of a color of aground film synergistically acts with each other. As a result, it ispossible to confirm the wiping state of sebum easily and clearly,thereby making it possible to afford sufficient wiping feeling andsatisfactory feeling to users. Furthermore, this oil clearing sheet hasgood feeling to the skin and is not broken during the use.

We claim:
 1. An oil clearing sheet for makeup comprising a porous stretched film of a plastic material, characterized in that the porous stretched film comprises at least two porous stretched films, which are the same or different, and adjacent films differ in brightness.
 2. The oil clearing sheet according to claim 1, wherein the brightness of the porous stretched film is represented by a value of L* of a CIEL*a*b* color system and a value of L* of the porous stretched film as an uppermost layer is larger than that of the underlying film under the uppermost layer.
 3. The oil clearing sheet according to claim 2, wherein a difference between the value of L* of the porous stretched film as the uppermost layer and the value of L* of the underlying film is at least 0.8.
 4. The oil clearing sheet according to claim 1, wherein the porous stretched film has the following layer constitution: (1) film A/film B, (2) film A/film B/film A, or (3) film A/film B/film C/film B/film A wherein a film A is a porous stretched film as an uppermost layer.
 5. The oil clearing sheet according to claim 1, wherein the porous stretched film is formed by co-extrusion molding.
 6. The oil clearing sheet according to claim 1, wherein the sheet further comprises a hydrophilic liquid absorbing substance. 